On Wed, 26 Sep 2001 00:28:31 -0400, Peter Teuben staggered into the
Black Sun and said:
>> USB hard disks that follow the USB Mass Storage standards are
>> supported in the 2.4 kernel series. With Redhat 7.1's default
>> kernel, you "modprobe usb-storage ; modprobe ide-scsi" and plug the
>> disk in. The disk will be recognized as /dev/sda unless you have any
>> other SCSI disks attached to this laptop. USB Storage devices are
>> treated as SCSI devices for various reasons.
>> You can treat this disk just like any other disk wrt partitioning and
>> mkfs'ing, but you'd better umount all its partitions before you
>> unplug it, and it will be slow. (Firewire disks are *much* nicer.)
>slow huh? can somebody do an
> hdparm -Tt /dev/sda
>on one of those and report?
Um, hdparm is for IDE disks only. Far better to use bonnie++ in the
general case. Also, the maximum bandwidth on USB version 1 is 12
Mbit/s. Without protocol overhead, that's 1.5Mbyte/s, and there will be
protocol overhead. By comparison, my 1997-vintage Thinkpad 380D got
3Mbyte/s when all the stops were pulled out. It's not bad, but it's
quite a bit slower than the disk in your desktop or laptop.
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
Brainbench MVP for Linux Admin / That which does not kill us
http://www.brainbench.com / makes us stranger.
-----------------------------/ --Trevor Goodchild, "AEon Flux"